Rotary cutter-head



(No Model.)

2 sheets-sheet y K.NELS0N. ROTARY GUTTER lHEAD.

Patented July 25, 1893.

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No Model.) 2 sheets-sheetfz. K. NELSON. RUTARY GUTTER HEAD'.

Patented July 25 Fmg.l

UNITED STATES PATENT OFFICE.

KILBURG NELSON, OF WEST DULUTH, MINNESOTA.

ROTARY CUTTER-HEAD.

SPECIFICATION forming part of Letters Patent No. 501,956, dated July 25, 1893.

Application filed November 19, 1892. Serial No. 452,580. (No model.)

To all whom it may concern:

Be it known that I, KILBURG NELSON, a citizen of the United States, residing at West Duluth, in the county of St. Louis and State of Minnesota, have invented a new and useful Rotary Cutter-Head, of which the following is a specification.

This invention relates to cutter heads for wood working machines, and it has for its object to provide an improved cutter head of the rotary type, that can be readily adapted for use on the shaft of any saw table or other similarwood working machine, and is of such construction as to take up but a small amount of space thereon.

To this end the invention primarily contemplates an improved cutter head provided with special attachments and adjustments whereby the wheel or head is adapted for cutting or boring grooves, in any kind or grain of wood, ranging from three-sixteenths of an inch to two and one-fourth inches, and in this use being both eective and rapid.

With these and other obj ects in view which will readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination and arrangement of parts hereinafter more fully described, illustrated and claimed.

In the accompanying drawings z-Figure l is a plan view of a rotary cutter or grooving wheel constructed in accordance with this iuvention, showing all the cutters in position adapting the wheel for cutting grooves from three-fourths of an inch to two and onefourth inches. Fig. 2 is a vertical transverse sectional view of the same mounted on the shaft taken on the line :1a-az of Fig. 1. Fig. 3 .is a view similar to Fig. l showing the sliding cutter heads removed, and the wheel adapted for grooving from three-sixteenths to three-eighths of an inch. Fig. 4. is a vertical sectional view of the construction disclosed in Fig. 3, and the wheel on a shaft and taken on the line 'y-y of such figure. Fig. 5 is a detail in perspective of one of the sliding cutter heads. Fig. 6 is a similar view of a pair of the toothed cutters. Fig. 7 is a detail in perspective of the wheel stock with the several cutters removed. Fig. 8 is a detail in perspective of a plain cutter. Fig. 9 is a detail view of the connection for one of the serrated cutters.

Referring to the accompanying drawings:- A represents a saw table shaft, or any suitable revolving shaft on which is mounted the cutter wheel B. The cutter wheel B, is provided with the central disk C, which is secured directly on the shaft and which is surrounded by the rim D, which comprises the two oppositely slanting or inclined sections E, each of which is provided with a curved slot F. At the meeting points of the two oppositely slanting or inclined sections E, which are at an angle to the vertical plane of the disk C, are formed the opposite notched seats G, which are arranged at opposite edges and on opposite sides of the wheel, and are designed to accommodate the radially adjustable toothed cutters H.

The toothed cutters H, are provided with the slotted shanks h, and a series of saw cutting teeth I, which are designed to travel into the wood and servel in the capacity of saws and cutters to cut and groove the piece of work.

As illustrated in the drawings, the cutters H, come in two sizes, the smaller of which are used independently of any other cutting devices on the wheel, as illustrated in Figs. 3

and 4. of the drawings, and are designed to cut from three-sixths of an inch, their width, to three-eighths of an inch, the width of the other size of cutters H. As illustrated in Fig.

4 of the drawings, by loosening the bolts h', engaging the slotted shanks of said cutters, the said cutters can be adjusted laterally from the rim of the wheel by means of the adjusting screws J, passing through said rim and engaging the inner faces of the cutters, the said cutters being adjusted in opposite directions to each other to cut from three-sixteenths of an inch to three-eighths of an inch. By removin gthe three-sixteenthsinch cutters and placing the three-eighths inch cuttersin position, by the same adjustment, the groove can be cut from three-eighths of an inch to threefourths of an inch.

The cutters H, have been described as being used independently, when cutting small grooves, but in cutting grooves from threefourths of an inch to two and one-fourth ICO inches the said toothed cutters, cut in the center of the work being grooved, and when thus employed are used in connection With the cutting devices of the circumferentially and laterally adjustable sliding heads K. The sliding heads K, are mounted to slide on the oppositely slanting or inclined sections E, of the riml and on opposite sides thereof, so as to adjust all the cutters on the same cutting line, shown in dotted lines in the drawings. The heads K, are provided with the squared lugs K moving in the curved slots F, of the sections E, so as to strengthen the connection of the heads to the rim of the wheel, on the bolts L. The sliding heads K, are provided with the ilat slightly inclined edges M, upon which are mounted the adjustable plain cutters N, which are provided with slots n, engaged by the clamping bolts n', which provide means for l the tangential adjustment of the plain cutters. l Directly in advance of the flat edge M, thei heads K, are further provided with the short arms O, in which on one face are formed dove- The dove-tailed grooves; 0, accommodate the radially adjustable serrated saw cutters P, which are adj ustably held in position in said dove-tailed grooves by" means of the headed bolts Q,passing through said short arms and engaging one edge of saidf tailed grooves o.

serrated cutters.

Now with the general construction of the'f rotary cutter in mind, it will be readily seen that in cutting grooves varying from threefourths of an inch to two and one-fourth" inches, the serrated saw cutters P, travel in advance of the plain and toothed cutters so as to break the surface and edge of the groovefv and 'thereby prevent the cutters, following,

from splitting or tearing, while the plain slightly inclined cutters directly after the seri rated cutters, chisel out the width of the groove while the toothed cutters following pass through the center of the groove andv line up the bottom edge of the same. Now it will be clear that by circumferentially adjust#y ing the sliding heads K, on the oppositely; slanting or inclined sections, equal distances, the same will be laterally adjusted away' from the center of the disk E, and thereby pro` vide means for widening the groove to be cut, while by leaving the toothed cutters stationary the same always remain in the center of the cutting line of the wheel, that Vis at a" central point between the farthest opposite edges of the cutters of the opposite heads.'v It will also be obvious that any `depth of work ranging from one-sixteenth to one and onefourth inches can be secured bythe radial adjustment of the toothed and serrated cutters, and the tangential adjustment of the plain cutters. From the foregoing it is thoughty that the several adjustments and adaptations of the cutters will now be apparent.

As illustrated in the drawings, it will be seen, that the edges of the rim sections over which the cutter heads slide maybe provided with a graduated scale R, by means of which the adjustment of the heads can be accurately regulated so that the width ot' groove between threefourths of an inch and two and one-fourth inches can be accurately determined.

It is to be understood that changes in the form, proportion and the minor details of construction may be resorted to Without departing from the principle or sacrificing any of the advantages of this invention.

Having thus described my invention, what I claim, and desire vto secure by Letters Patent, is-

l. In a rotary cutter of the class described, the cutter wheel, having oppositely slanting or inclined rim sections, cutter heads circumferentially adjustable on said sections,and intermediate cutters ad j ustably secured to said wheel between said cutter heads, substantially as set forth.

2. In a rotary cutter, the cnttervwheel having opposite seats arranged on opposite sides of thesame, single saw toothed cutters mounted in said seats, and means `for radially and laterally adjusting each cuttersubstantially as Asett-Orth.

3. In a device of the class described, the cutter'wheel having opposite notched seats .arranged at opposite edges and-atopposite .sides ofl th e same, interchangeablesaw toothed cuttersmounted for longitudinal adjustment in said seats, and a series of adjusting screws arranged to eng-ago the innersi-des of vsaid cutters to adjust the same laterally in opposite direc-tion-s away from the wh-eel,substan.tially as set forth.

4, In a rotary cutter of the class described,

the cutter wheel having opposite rim sections set at opposite inclinations to the vertical plane of the hub of the Wheel and o-n both sides thereof, cutter heads circu-mferentially `adjustable on each of said 4inclined sections .at both sid-es of the wheel to secu-rea conse- `quent simultaneous lateral adjust-ment, and .cutters adjust-ably mounted on said heads, .substantially asset forth.

5. In a rotarycutter of the .class described, the wheel having oppositelyslantingfor 1ncli-ned rim sections in which are formed-curved slots, sliding cutter heads moving against opposite faces of the opposite rim sections and having lugs projecting into said slot-s, 'bolts passing through said cutter headsand s said slots, lcutters adj ustablymountedo-n said heads, and intermedi-ate cutters arranged between said cutter heads, substantially as set forth.

6. In arotarycutter of the cl-ass described, the cutter wheel having opposite rim sections arranged atan angle to each other, opposite cutter heads circumferentiallyadjustable on said rim sections to secure a con-sequent lateral adjustment and providedwith ilattened edges and grooves inv advance of said ledges, plain cutters adj ustably mounted on said IOO IIO

flattened edges, and saw cutters adj ustably I tened edges, saw cutters radially adjustable mounted in said grooves, substantially as set I in said grooves, and toothed cutters adjustforth. ably mounted on the Wheel between the cut- 7. vIn a rotary cutter of the class described, ter heads, substantially as set forth. I5 5 the Glitter wheel having opposite rim sections, In testimony that I claim the foregoing as vopposite sliding cutter heads circumferenmy own I have hereto affixed my signature in tially and laterally adjustable on said rim the presence of two witnesses.

sections and provided with slightly inclined KILBURG NELSON. flattened edges and arms having dove-tailed Witnesses: 1 Io grooves in advance of said flattened edges, OHAS. F. HOPKINS,

plain cutters adjustably mounted on said at- JUDSON D. HOLMES. 

